title: Two-photon lensless endoscope.
abstract: We report a first demonstration of two-photon endoscopic imaging with a lensless endoscope. The endoscope probe is a double-clad bundle of single-mode fibers; point excitation and scanning is achieved by coherent combining of femtosecond light pulses propagating in the single-mode fibers; and back-scattered two-photon signal is collected through the multi-mode inner cladding. We demonstrate the two-photon endoscope on a test sample of rhodamine 6G crystals.
authors.forename: Esben Ravn
authors.initials: ER
authors.lastname: Andresen
authors.forename: Géraud
authors.initials: G
authors.lastname: Bouwmans
authors.forename: Serge
authors.initials: S
authors.lastname: Monneret
authors.forename: Hervé
authors.initials: H
authors.lastname: Rigneault
mesh_terms: D003460:Crystallization; D019723:Endoscopes; D006801:Humans; D007909:Lenses; D017785:Photons; D012235:Rhodamines / Q000737:chemistry*
chemical_list: D012235:Rhodamines; C026188:rhodamine 6G